Install new dep in CI env

.gitlab-ci.yml

@@ -1,6 +1,6 @@
 before_script:
   - apt-get update -y
-  - apt-get install -y rsync
+  - apt-get install -y rsync libfixposix-dev
   - PATH=${HOME}/.roswell/bin:$PATH
   - ROSWELL_INSTALL_DIR=${HOME}/.roswell
   - curl -L https://raw.githubusercontent.com/snmsts/roswell/master/scripts/install-for-ci.sh | sh